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Sherborne Sensors A215/220 series Servo Accelerometers measure vector acceleration with high accuracy using a closed loop force balance torque mechanism. Typical applications include data acquisition systems, crash recorders, fatigue life monitoring and prediction; stabilizing platforms on space and ship borne satellite tracking systems; monitoring and controlling deceleration in mass transit systems; road bed analysis and fault detection equipment for high speed railways; military and civil flight simulators; autopilots and low frequency vibration monitoring. In addition, Sherborne Sensors designs custom accelerometers for specific applications. These custom designed units can be manufactured and tested to conform to military standards.

All Sherborne Sensors A215/220 series accelerometers operate as a closed-loop torque balance servo system. With reference to the illustration below the pendulous mass 'A' develops a torque proportional to the product of its mass unbalance and the applied acceleration.The movement of mass 'A' is detected by position sensor 'B' whose output signal is connected to an amplifier. The resulting current is fed into the torquer motor 'C' which then develops a torque exactly equal to, but directly opposed to the initial torque from the pendulous mass 'A'. Mass 'A' stops moving, assuming a position minutely differing from its zero 'g' position. Simultaneously, the current to the torquer motor is fed through a stable resistor, to provide an output voltage proportional to the applied acceleration.

The system is damped by means of a phase advancing network within the integrated thick film module. The Sherborne Sensors A215/220 series servo operation can be self-tested after installation by applying an independent current input to the torquer motor. By adjusting the parameters of the servo amplifier and related electronics, the operating characteristics of the servo accelerometer can be changed or modified to suit a particular application.

For additional technical details, drawings and specifications, please contact Sherborne Sensors toll-free (in the US & Canada) at 1-877-486-1766 nasales@sherbornesensors.com or on +44 (0) 870 444 0728 sales@sherbornesensors.com (worldwide), or by visiting www.sherbornesensors.com.

About Sherborne Sensors:
Sherborne Sensors is a global leader in the design, manufacture and supply of high-precision inclinometers, accelerometers, force transducers and load cells, rotary encoders, instrumentation and accessories for industrial, military and aerospace customers. Products offered under the Sherborne Sensors brand are renowned for their ultra-reliability and long-life precision within critical applications. Recent acquisition of synergistic technologies by Sherborne Sensors within our inclinometer and force and load cell offerings has allowed customers to benefit from expanded product lines, with added benefits of engineering support, global sales presence, repair, refurbishment and calibration services, stocking programs, and continuous product improvement. Establishment of our new North American operations in 2009 has added enhanced local support offerings, and allowed Sherborne Sensors to offer even greater service to our valued customers.